#include<stdio.h>
#include<stdlib.h>


extern "C"
{
  int add_three(int x, int y,int z);
}

void setup()
{
  Serial.begin(9600);
}

int main()
{
  int x,y,z,add;

  printf("Enter the first number:");
  scanf("%d",&x);
  printf("%d",x);
  printf("\nEnter the second number:");
  scanf("%d",&y);
  printf("%d",y);
  printf("\nEnter the third number:");
  scanf("%d",&z);
  printf("%d",z);

  add = add_three(x,y,z);
  printf("\nThe addition is %d\n",add);
  return 0;
}